Polyvinyl siloxane (PVS), also called poly-vinyl siloxane, vinyl polysiloxane (VPS), or vinylpolysiloxane, is an addition-reaction silicone elastomer (an addition silicone). ... Polyvinyl siloxane is widely used in dentistry as an impression material.
What is vinyl polysiloxane used for?
Vinyl Polysiloxane Impression Material (VPS) is a hydrophilic material used for dental and gingiva impressions. VPS enables a dentist to make more accurate impressions that resist distortion and tearing when being removed. This allows for better fitting restorations.
What is the difference between polyether and polyvinyl siloxane?
Polyethers are known for their hydrophilic properties and good flowability. Polyvinyl siloxanes, on the other hand, are known for their excellent elasticity, high tear strength and stability. The decision to use one over the other varies among clinicians and is based on personal preference.Jun 13, 2013
What does pvs stand for dental?
polyvinyl siloxane
What is polyvinyl siloxane used for?
(A polyvinyl siloxane putty impression over the wax-up is used to make a stent, which in turn is used to fabricate provisional restorations for the patient.
Is polyvinyl siloxane hydrophobic?
Polyvinyl siloxanes are hydrophobic because of their chemical structure. They contain hydrophobic aliphatic hydrocarbon groups around the siloxane bond . Polysulfides and polyethers are more hydrophilic.Jun 15, 2016
How long does a PVS impression last?
PVS impressions can be poured between 30 minutes and 4 weeks.
What are some of the advantages of polyether impression material?
Polyether provide good accuracy and sur- face detail as well as low shrinkage upon setting. Its flexibility is also very low and stiffness is high (3,12). ... A further advantage of polyether is its short setting time in the mouth (less than half the time required for polysulfide).
Is polyvinyl siloxane hydrophilic?
Polyvinyl siloxanes are inherently hydrophobic. However, new hydrophilic polyvinyl siloxane impression materials have been recently introduced. These new formulations have intrinsic surfactants added.